According to DD2's enraged, ranty meltdown this evening.
She was very pleased when we said she was having 'burger' for dinner, then her joy turned to shock, horror and outrage when she realised there was no burger bun.
After some minutes of ranty outraged lecturing on the definition of burger, she calmed.
Then DH offered grated cheese (we were having it with potato salad, etc.), at which point DD2 turned to me and said:
"mum, I'm using my calm voice, but so you know, actual burgers, the ones with bread underneath and on top, have flat, square, thin bits of cheese. Orange or yellow."